Moving warm air with an inline fan.

I am new to this forum and was wondering if anyone had advice on my project.

I have a wood stove in the kitchen in my house and I would like to move the warm air from the kitchen to the master bedroom which is about a 65 foot duct run with one 90 degree turn.

My idea was to use an inline fan such as a Vortex fan with an 8" duct installed in the attic space with ceiling registers to move the air.

My questions are:

1. What size fan would efficiently & quietly do the job?
2. Is 8" duct large enough or to small?
3. Should the fan "pull" the air or "push" the air? or be located in the middle of the run.
4. If I want to split the run to other rooms should I use a plenum or "Y's"

These are my questions at this time. If anyone can help it will be greatly appreciated.

Thanks everyone,
Steve.

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Moving warm air with an inline fan.

My sugestion, Run an 8" run at least 40', build a plenum and branch off the plenum with 4" duct to feed each room. Install two (at plenum) 4" booster fans to pull air to the room you want heat. Intall 120V t-stats to each fan to controll off and on in each space. Important make sure you are just moving heated space not Carbon Monoxide.

Moving warm air with an inline fan.

This is a project that I would like to complete before this winter. I am researching any information that I can find.

I like the idea of a larger duct as the fan I am leaning towards is a "Fantech" CF1410. It is an 8" inline fan that produces 408 CFM @ ) 0" static pressure. 173 CFM @ 1.0" static pressure.

It has a variable speed 115V motor which I plan to connect to a controller in the hallway.

Any thoughts on pulling the air or pushing the air??

Thanks everyone,

Steve.

Answer your own question! Why would you push airflow back? You are already pushing air from the outside or insinde fan, to be non jugmental. Push and Pull mean the same thing 1 direction. Direct the airflow to what ever the room needs more CFM's. Sure to to get a a reply from Beenthere/Knowitall. Good luck could solve your problem in 1 hour.

Moving warm air with an inline fan.

Quote:

Originally Posted by lamon2524

Answer your own question! Why would you push airflow back? You are already pushing air from the outside or insinde fan, to be non jugmental. Push and Pull mean the same thing 1 direction. Direct the airflow to what ever the room needs more CFM's. Sure to to get a a reply from Beenthere/Knowitall. Good luck could solve your problem in 1 hour.

LOL...

An 8" flex duct, would have a minimum of .4" static moving 400 CFM.
A 10" flex duct would be .18".

You need to decide how much air you want to move.

A 6" flex, will have minimum of .1" static at 75 CFM.

You can use a 10" duct, and 2 10 X8 reducers if you want to install your fan in the middle of the 10" run.

A friction rate chart, only shows how much pressure you will lose. Not how much pressure is in the duct. Many are confused on this.

So how much air do you want to move, and at what static can your fan move that amount of air.

For the record. A 4" flex duct can move 32 CFM at roughly .12" static.